No money has been received yet. You were spot on to say 'If she was so easy to deal with as she claimed-wouldn't have that happened already' because as all of us are aware, even though you raised a dispute and claim with paypal, you can still cancel it anytime if both seller and buyer decides to resolve it between themselves. I never once receive a message from her to mention that she is willing to accept any returns nor to apologise for 'missing' those crucial tarnish on the chains. You are right this forum gets a lot of attention and many buyers do browse through this site before even buying anything...therefore I do understand where she is coming from, I would be hopping mad if I were her too. But if I were her, I would do these 2 things,
a) Contact buyer immediately, apologise for missing the tarnish on the chain, offer a full refund for return of bag and offer to refund shipping too, and
b) State in this link that I have offered (a) above to buyer so everyone can see.
As a buyer who had received such brilliant service from an apologetic seller, I would not only apologise for jumping the gun, but also have the confidence to buy from her again. Not only that, I would mention her to all of my friends who loves vintage Chanels (and I do have many) and let them know how brilliant the seller was dealing with this.